List of Figures

Figure 3-1	The pools and flows of C, and the major parameters and factors which control the flows.
Figure 3-2	Flow diagram for the soil water submodel for monthly Century. In this case, there are 5 layers (NLAYER = 5).
Figure 3-3	The pools and flows of N, and the major parameters and factors which control the flows.
Figure 3-4	The pools and flows of P, and the major parameters and factors which control the flows.
Figure 3-5	The equilibrium between labile and sorbed P pools, showing the effect of changing sorption affinity or the sorption maximum.
Figure 3-6	The pools and flows of S, and the major parameters and factors which control the flows.
Figure 3-7	Flow diagram for the crop/grassland submodel.
Figure 8a	The impact of soil temperature on potential plant growth of different communities of C3 and C4 plants.
Figure 8b	The impact of soil temperature on potential plant growth of different crops.
Figure 9	The impact of soil texture, and moisture availability, expressed as the ratio of monthly precipitation + stored water + irrigation to PET rate, on potential growth.
Figure 10	The effect of plant growth on the scaling factor for seedling growth.
Figure 11	The effect of time since planting on the allocation of C to roots.
Figure 12	The effect of annual precipitation on the allocation of C to roots for the Great Plains grasslands, with FRTC(1) = 0.
Figure 13	The effect of plant biomass on the C/N ratio in new increments of plant growth (as parameterized for wheat).
Figure 14	The effect of root biomass on nutrient availability.
Figure 15	The effect of moisture stress on harvest index.
Figure 16	The effect of soil moisture status and available water holding capacity (AWHC) on shoot and root death.
Figure 17	Flow diagram for the forest production submodel.
Figure 18	The effect of forest leaf area index (LAI) on potential plant production (Waring and Schlesinger, 1982).
Figure 19	The effect of live large wood C on the sapwood to large live wood C ratio. Parameter SAPK is in the tree.100 parameter set.
Figure 20	The effect of live large wood C on the maximum ratio of live leaf C to large wood C. This is a species-specific equation; Parameters MAXLAI and KLAI are in the tree.100 parameter set.
Figure 21	The effect of tree cover and live leaf biomass on the shade modifier for crop/grassland growth.
Figure 22	The fraction of N available for tree growth as a function of available N and tree basal area.
Figure 23	Simplified flow chart for monthly Century.
Figure 24	The relationship of the CO₂ effect factor and CO₂ concentration on precipitation and transpiration.